They/looking forward to here/you/soon

=> They are looking forward to hearing from you soon.

Hoa spends  a lot of  money on clothes

=> How much money doeas Hoa spend on clothes?

1. the course begins ..........on........2 January, and ends sometimes .........in.......April

2 the children aren't here at the moment, but they'll be back ...........in........ a few minutes

3. we're having a party ........on........New year's Eve. Can you come ? I'm afraid I can't. I don't like going out ........at.......night

4. shall we go now? no, let's wait ..........till/until..........it stops raining

5. i've got an interview next week. it's ...........at.........9.30.........on........tuesday morning

6. bill has worked in this company.......for......five years.......since.......he graduated from Boston University

7. it rained.......during/in...... the night ......for..... two or three hours

Số tiền lãi tính theo  giá bán là

20 : 80 x 100 = 25 %

Đáp số 25 %

{1;3} {2;4}

97 năm nữa. Nhưng cho mình hỏi Doraemon có thật không đấy?!!

a) A={ 6,7,8}

b)B = { 1,2,3,4,5,6}

\(\left(6-\frac{2}{3}+\frac{1}{2}\right)-\left(5+\frac{5}{3}-\frac{3}{2}\right)-\left(3-\frac{7}{3}+\frac{5}{2}\right)\)

\(=6-\frac{2}{3}+\frac{1}{2}-5-\frac{5}{3}+\frac{3}{2}-3+\frac{7}{3}-\frac{5}{2}\)

\(=\left(6-5-3\right)+\left(-\frac{2}{3}-\frac{5}{3}+\frac{7}{3}\right)+\left(\frac{1}{2}+\frac{3}{2}-\frac{5}{2}\right)\)

\(=-2+0-\frac{1}{2}\)

\(=-\frac{4}{2}-\frac{1}{2}\)

\(=-\frac{5}{2}\)

\(-x-\frac{2}{3}=-\frac{6}{7}\)

\(-x=-\frac{4}{21}\)

\(x=\frac{4}{21}\)

4x : 17 = 0

=> 4x = 0 

=>  x  = 0